Meeting requests in all users

Hello,

In our company we have a policy that every mail a user gets is copied to the info box, so far so good.
When a meeting request is send to a user (and also the info box) every user sees this meeting request. Is there a way to prevent all users are seeing that meeting request in their own calendar?

Running on Centos 7.5 Kopano 8.4.5

Thanks in advance

would filtering rules work? the downside would be a rule per user.

Per user would be a crime to do ;-)
Is this behavior normal, or is this a bug in Kopano?